linux-kernel - [PATCH 5.16 033/200] ceph: properly put ceph_string reference after async create attempt

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Message-Id: <20220131105234.680676359@linuxfoundation.org>
Date:   Mon, 31 Jan 2022 11:54:56 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jeff Layton <jlayton@...nel.org>,
        Ilya Dryomov <idryomov@...il.com>
Subject: [PATCH 5.16 033/200] ceph: properly put ceph_string reference after async create attempt

From: Jeff Layton <jlayton@...nel.org>

commit 932a9b5870d38b87ba0a9923c804b1af7d3605b9 upstream.

The reference acquired by try_prep_async_create is currently leaked.
Ensure we put it.

Cc: stable@...r.kernel.org
Fixes: 9a8d03ca2e2c ("ceph: attempt to do async create when possible")
Signed-off-by: Jeff Layton <jlayton@...nel.org>
Reviewed-by: Ilya Dryomov <idryomov@...il.com>
Signed-off-by: Ilya Dryomov <idryomov@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/ceph/file.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -746,8 +746,10 @@ retry:
 				restore_deleg_ino(dir, req->r_deleg_ino);
 				ceph_mdsc_put_request(req);
 				try_async = false;
+				ceph_put_string(rcu_dereference_raw(lo.pool_ns));
 				goto retry;
 			}
+			ceph_put_string(rcu_dereference_raw(lo.pool_ns));
 			goto out_req;
 		}
 	}